Getting all of the primaries the same length and all finishing at the same place aint easy...
Primaries made of mandrel bends all tacked in place.
Complex routing so that all the primaries are the same length.
4-1 header collector. Notice the narrowing in the throat before the main exhaust size.
Notice the intricate pyramid in the middle of the 4 primaries.
Reverse view of the collector. You can just see the back of the internal pyramid.
